I have been seeing more info come to light around Tesla's possible utilization of ultracapacitors for regeneration and would like to begin looking at doing this with my marine project. I am re-powering a 42' sloop with a 20kw pmac motor from Electric Yacht with 48v 400ah lifepo4 battery as the power supply. The standard regen process will put amps back into the battery above a certain hull speed. Current white papers on using ultracapacitors in that regen process claim better efficiencies because the UC's charge faster and in turn discharge faster into the main battery bank (lifepo4 in my case). If anyone is familiar with this concept I would love to discuss. And Will if your lisrening this would make for a really interesting video as a proof of concept.